Diodes Incorporated AP2820BMTR-G1

Overview

AP2820BMTR-G1 from BCD Semiconductor Manufacturing Limited is a high-side power distribution switch with active-high enable and open-drain FLAG output, designed for USB-compliant hot-plug power control. It integrates an N-channel MOSFET with 60 mΩ R_DS(ON), soft-start, over-current protection with fold-back, thermal shutdown, and under-voltage lockout (UVLO), supporting 2.0 A continuous load in notebook and motherboard USB hub applications.

For engineers reviewing the AP2820BMTR-G1 datasheet, AP2820BMTR-G1 pinout, AP2820BMTR-G1 application, or AP2820BMTR-G1 equivalent, this device delivers precise current limiting (2.2–3.2 A), low quiescent supply current (75 μA typ.), and fault-flag timing (5–15 ms delay) critical for USB bus power integrity and host-controller fault coordination.

Technical Context

The AP2820BMTR-G1 implements a charge-pump–driven high-side N-MOSFET switch with integrated UVLO (2.2–2.7 V threshold, 0.2 V hysteresis), enabling reliable turn-on only within 2.7–5.5 V input range. Its fold-back over-current protection reduces short-circuit current to 1.18 A while maintaining thermal shutdown at 150 °C with 30 °C hysteresis.

It features deglitched open-drain FLAG output with 35–70 mV low-state voltage at 5 mA sink, and supports no reverse current flow when disabled. The active-high EN pin accepts logic-level thresholds (VENH ≥ 1.6 V, VENL ≤ 1.0 V), and internal pull-low resistor ensures safe output shutdown for A/C/E/G versions - including BMTR-G1's B variant without auto-discharge.

Key Specifications

Pinout & Package

AP2820BMTR-G1 is supplied in SOIC-8 package (4.90 × 3.90 × 1.75 mm), RoHS-compliant and green (G1 suffix). Pin functions are validated per BCD Semiconductor's Rev 1.7 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with TPS2051BDBVR and NIS5132MN, AP2820BMTR-G1 uniquely combines USB-compliant R_DS(ON), integrated FLAG with deglitching, UVLO, and soft-start in a single SOIC-8 package - reducing BOM count and improving fault visibility in space-constrained USB host designs.

Availability

AP2820BMTR-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard PC designs, and hot-plug power supplies requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for AP2820BMTR-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-reliability, cost-optimized semiconductor solutions for consumer, computing, and industrial markets.

The AP2820 product line targets USB-compliant power distribution with integrated protection - engineered specifically for hot-plug resilience, low dropout, and host-controller–friendly fault signaling in compact computing platforms.

FAQ

What is the function of the FLAG pin on AP2820BMTR-G1?

The FLAG pin is an open-drain output that actively pulls low (≤70 mV at 5 mA) during over-current or over-temperature faults. It requires an external pull-up resistor and provides a deglitched signal with 5–15 ms delay to ensure noise immunity. This enables direct interfacing with USB host controllers or microcontrollers for fault logging and graceful shutdown.

Does AP2820BMTR-G1 support reverse current blocking?

Yes - AP2820BMTR-G1 blocks reverse current flow from VOUT to VIN when disabled, with leakage ≤1.0 μA. This eliminates the need for an external blocking diode in battery-charger or dual-rail systems where backfeed could damage upstream sources or drain batteries.

How does the soft-start feature operate in AP2820BMTR-G1?

Soft-start limits inrush current by controlling the MOSFET gate ramp rate, resulting in a 500 μs output rise time from enable activation to 90% of final VOUT. This prevents input rail collapse during hot-plug events and avoids false triggering of upstream over-current protection in USB hosts or power supplies.

What is the difference between AP2820BMTR-G1 and AP2820AMTR-G1?

AP2820BMTR-G1 uses active-high enable without auto-discharge, while AP2820AMTR-G1 adds internal auto-discharge (100–200 Ω pull-low) on VOUT after disable. Both share identical R_DS(ON), current rating, and protection features. Choose BMTR-G1 when external discharge control is preferred; AMTR-G1 when rapid VOUT decay is required post-shutdown.